INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.4 on date 20-09-2018 and time 02:59:05 (Italy) in region 2 km SE Norcia (PG)

A magnitude ML 1.4 earthquake occured in region: 2 km SE Norcia (PG), on

  • 20-09-2018 00:59:05 (UTC)
  • 20-09-2018 02:59:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.78, 13.11 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Norcia PG 2 4957 4957
Cascia PG 11 3217 8174
Preci PG 13 724 8898
Castelsantangelo sul Nera MC 13 281 9179
Accumoli RI 15 667 9846
Arquata del Tronto AP 15 1178 11024
Poggiodomo PG 16 117 11141
Cerreto di Spoleto PG 17 1075 12216
Visso MC 17 1107 13323
Ussita MC 18 444 13767
Cittareale RI 19 482 14249
Sellano PG 19 1079 15328
Monteleone di Spoleto PG 19 599 15927
Montegallo AP 19 523 16450

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km SE of Foligno (57155 inhabitants)
45 Km NE of Terni (111501 inhabitants)
50 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
69 Km SE of Perugia (166134 inhabitants)
90 Km W of Montesilvano (53738 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
92 Km NE of Guidonia Montecelio (88673 inhabitants)
94 Km N of Tivoli (56533 inhabitants)
97 Km W of Pescara (121014 inhabitants)
99 Km SW of Ancona (100861 inhabitants)
99 Km W of Chieti (51815 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.4 2018-09-20
00:59:05
42.78 13.11 8 2018-09-20
01:05:02
Sala Sismica INGV-Roma 61126361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-20 00:59:05 ± 0.08
Latitude 42.78 ± 0.00
Longitude 13.11 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61126361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 463
Semi-minor axis of confidence ellipse (meter) 355
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 58
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 36
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 38
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.661
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 21
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 61126361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-09-20 01:05:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MODR.HHZ. 2018-09-20T00:59:35.93 3.0 undecidable manual Pn 0.71 0
IV.ARVD.HHZ. 2018-09-20T00:59:31.20 3.0 undecidable manual S -0.09 0
IV.VCEL.EHZ. 2018-09-20T00:59:29.81 0.3 undecidable manual S 125 0.661 50 1.69 34
IV.EL6.EHZ. 2018-09-20T00:59:25.22 3.0 undecidable manual S -0.14 0
IV.OFFI.HHZ. 2018-09-20T00:59:23.77 0.3 undecidable manual S 70 0.4479 50 1.96 29
IV.GIGS.HHZ. 2018-09-20T00:59:21.99 0.6 undecidable manual S 134 0.4712 50 -0.52 43
IV.MOMA.HHZ. 2018-09-20T00:59:20.31 0.6 undecidable manual S 274 0.3975 50 -0.02 48
IV.SSFR.HHZ. 2018-09-20T00:59:19.34 3.0 negative manual P -0.09 0
IV.TERO.HHZ. 2018-09-20T00:59:19.68 0.6 undecidable manual S 113 0.3948 50 -0.55 43
IV.ARVD.HHZ. 2018-09-20T00:59:19.54 3.0 negative manual P -0.42 0
IV.MF5.EHZ. 2018-09-20T00:59:18.72 0.6 undecidable manual S 51 0.3283 50 0.45 45
IV.GUMA.HHZ. 2018-09-20T00:59:18.64 0.6 undecidable manual S 30 0.3256 50 0.44 45
IV.VCEL.EHZ. 2018-09-20T00:59:18.79 0.6 negative manual P 125 0.661 50 0.23 44
IV.CAMP.HHZ. 2018-09-20T00:59:17.76 0.3 undecidable manual S 138 0.3283 50 -0.51 66
IV.CESI.HHZ. 2018-09-20T00:59:16.04 0.6 undecidable manual S 326 0.2707 106 -0.27 47
IV.RM33.EHZ. 2018-09-20T00:59:16.64 0.3 undecidable manual S 164 0.2824 105 -0.1 73
IV.EL6.EHZ. 2018-09-20T00:59:16.39 3.0 positive manual P -0.24 0
IV.OFFI.HHZ. 2018-09-20T00:59:15.57 0.6 negative manual P 70 0.4479 50 0.65 41
IV.FDMO.HHZ. 2018-09-20T00:59:15.42 0.1 undecidable manual S 356 0.2563 106 -0.36 93
IV.GIGS.HHZ. 2018-09-20T00:59:14.79 0.6 undecidable manual P 134 0.4712 50 -0.53 43
IV.ASSB.HHZ. 2018-09-20T00:59:14.19 0.1 positive manual P 308 0.4227 50 -0.29 91
IV.MOMA.HHZ. 2018-09-20T00:59:14.10 0.1 undecidable manual P 274 0.3975 50 0.04 96
IV.MMO1.EHZ. 2018-09-20T00:59:13.32 0.6 undecidable manual S 53 0.197 111 -0.31 47
IV.LNSS.HHZ. 2018-09-20T00:59:13.50 0.3 undecidable manual S 196 0.1853 112 0.3 71
OB.GAVE.EHZ. 2018-09-20T00:59:13.50 0.6 undecidable manual S 241 0.1826 113 0.4 47
IV.MF5.EHZ. 2018-09-20T00:59:13.03 1.0 negative manual P 51 0.3283 50 0.16 24
IV.MTRA.EHZ. 2018-09-20T00:59:13.83 0.6 undecidable manual S 96 0.2104 110 -0.27 48
IV.TERO.HHZ. 2018-09-20T00:59:13.55 0.1 undecidable manual P 113 0.3948 50 -0.45 88
IV.ARRO.EHZ. 2018-09-20T00:59:12.96 1.0 negative manual P 232 0.3247 50 0.16 24
IV.CAMP.HHZ. 2018-09-20T00:59:12.52 0.1 positive manual P 138 0.3283 50 -0.35 92
IV.GUMA.HHZ. 2018-09-20T00:59:12.85 0.6 undecidable manual P 30 0.3256 50 0.02 49
IV.CSP1.EHZ. 2018-09-20T00:59:12.41 0.6 negative manual P 12 0.3184 50 -0.29 46
IV.FDMO.HHZ. 2018-09-20T00:59:11.24 0.1 positive manual P 356 0.2563 106 -0.19 96
IV.CESI.HHZ. 2018-09-20T00:59:11.63 0.1 positive manual P 326 0.2707 106 -0.1 98
IV.RM33.EHZ. 2018-09-20T00:59:11.80 0.3 positive manual P 164 0.2824 105 -0.18 72
IV.MC2.EHZ. 2018-09-20T00:59:11.93 0.6 undecidable manual S 23 0.1421 118 0.23 49
OB.GAVE.EHZ. 2018-09-20T00:59:10.39 0.6 undecidable manual P 241 0.1826 113 0.51 45
IV.MTRA.EHZ. 2018-09-20T00:59:10.48 0.3 negative manual P 96 0.2104 110 0.02 75
IV.MMO1.EHZ. 2018-09-20T00:59:10.14 0.1 negative manual P 53 0.197 111 -0.05 100
IV.SMA1.EHZ. 2018-09-20T00:59:10.78 0.3 positive manual P 132 0.223 109 0.06 74
IV.LNSS.HHZ. 2018-09-20T00:59:10.36 1.0 undecidable manual P 196 0.1853 112 0.42 23
IV.MC2.EHZ. 2018-09-20T00:59:09.38 0.6 negative manual P 23 0.1421 118 0.31 48
IV.NRCA.HNZ. 2018-09-20T00:59:09.05 0.6 undecidable manual S 2 0.0531 145 0.01 52
IV.NRCA.HNZ. 2018-09-20T00:59:07.87 0.1 negative manual P 2 0.0531 145 0.33 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HHE. ML:2.4 0.004445 0.18 AML other m 2018-09-20T00:59:09.10
IV.NRCA.HNE. ML:2.4 0.00433 0.18 AML other m 2018-09-20T00:59:09.10
IV.NRCA.HHN. ML:2.5 0.005765 0.14 AML other m 2018-09-20T00:59:09.09
IV.NRCA.HNN. ML:2.4 0.00505 0.14 AML other m 2018-09-20T00:59:09.09
IV.LNSS.HHN. ML:1.7 0.0003515 0.3 AML other m 2018-09-20T00:59:14.10
IV.LNSS.HHE. ML:1.7 0.0003705 0.18 AML other m 2018-09-20T00:59:14.29
IV.MTRA.EHE. ML:1.7 0.0003505 0.2 AML other m 2018-09-20T00:59:14.44
IV.MTRA.EHN. ML:1.7 0.000308 0.22 AML other m 2018-09-20T00:59:14.45
IV.MTRA.HNN. ML:1.7 0.00032 0.2 AML other m 2018-09-20T00:59:14.55
IV.MTRA.HNE. ML:1.8 0.000367 0.24 AML other m 2018-09-20T00:59:14.56
OB.GAVE.EHN. ML:1.3 0.0001515 0.18 AML other m 2018-09-20T00:59:14.85
OB.GAVE.EHE. ML:1.4 0.000204 1.8 AML other m 2018-09-20T00:59:14.08
IV.FDMO.HHE. ML:1.3 9.575E-5 0.4 AML other m 2018-09-20T00:59:15.57
IV.FDMO.HHN. ML:1.4 0.000135 1.22 AML other m 2018-09-20T00:59:15.73
IV.SMA1.EHE. ML:1.3 0.0001335 0.64 AML other m 2018-09-20T00:59:16.94
IV.CESI.HHN. ML:1.3 0.00010085 0.34 AML other m 2018-09-20T00:59:16.74
IV.RM33.EHE. ML:1.2 7.63E-5 0.62 AML other m 2018-09-20T00:59:17.37
IV.CESI.HHE. ML:1 5.17E-5 0.44 AML other m 2018-09-20T00:59:17.37
IV.RM33.EHN. ML:1.3 8.705E-5 0.2 AML other m 2018-09-20T00:59:17.81
IV.GUMA.HHE. ML:1.8 0.0002385 0.6 AML other m 2018-09-20T00:59:18.64
IV.SMA1.EHN. ML:1.4 0.0001385 0.66 AML other m 2018-09-20T00:59:19.67
IV.ARRO.EHN. ML:1 3.975E-5 0.14 AML other m 2018-09-20T00:59:20.14
IV.GUMA.HHN. ML:1.6 0.0001665 1.12 AML other m 2018-09-20T00:59:21.34
IV.TERO.HHN. ML:1.2 5.305E-5 0.54 AML other m 2018-09-20T00:59:21.39
IV.ARRO.EHE. ML:0.8 2.7E-5 0.24 AML other m 2018-09-20T00:59:21.71
IV.TERO.HHE. ML:1.2 5.285E-5 0.6 AML other m 2018-09-20T00:59:22.17
IV.MOMA.HHN. ML:1.4 7.125E-5 0.24 AML other m 2018-09-20T00:59:22.52
IV.MOMA.HHE. ML:1.2 4.895E-5 1.36 AML other m 2018-09-20T00:59:22.23
IV.ASSB.HHN. ML:1.1 3.685E-5 0.44 AML other m 2018-09-20T00:59:22.94
IV.ASSB.HHE. ML:1.1 3.505E-5 0.84 AML other m 2018-09-20T00:59:23.22
IV.SSFR.HHE. ML:1.3 3.05E-5 0.22 AML other m 2018-09-20T00:59:32.69
IV.SSFR.HHN. ML:1.3 3.215E-5 0.64 AML other m 2018-09-20T00:59:33.54
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download